Eighth Edition Elementary Statistics - Dr. Delisa Dismukes

Eighth Edition Elementary Statistics

A Step by Step Approach

Bluman Mc Graw Hill

A step by step Eleventh Edition

Series

Bluman, Chapter 1, 07/2011

1

Chapter 1

The Nature of Probability and Statistics

Introduction

Statistics is the science of conducting studies to collect, organize, summarize, analyze, and draw conclusions from data.

Bluman, Chapter 1, 07/2011

3

1-1 Descriptive and Inferential Statistics

A variable is a characteristic or attribute that can assume different values.

Variables whose values are determined by chance are called random variables.

The values that a variable can assume are called data.

A population consists of all subjects (human or otherwise) that are studied.

A sample is a subset of the population.

Bluman, Chapter 1, 07/2011

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E.g. A data set in table form (columns and rows):

id

gender

age

1

male

20

2

male

25

3

female

30

4

male

23

5

female

30

Bluman, Chapter 1, 07/2011

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